Drill Collars, Spiral Drill Collars, Integral Heavy Weight Drill Pipe, and several kinds of drilling tools, work-over tools, cementing tools, coring tools, fishing tools and fitting, Hydraulic Bucking Unit, Hydraulic Jar Tester, Hydraulic Down hole Motor Tester, BOP automatic cleaning systems and other equipments which includes more than 120 types of products and more than 1000 Specifications